Mainboard (60)
Instants (12)
Sorceries (11)
Artifacts (4)
Enchantments (5)
Dimir Tempo is a disruptive aggro-control deck that aims to strip your hand with Thoughtseize, counter your combo with Force of Will and Daze, and kill you with Murktide Regent, Nethergoyf, and Tamiyo. Your goal is to find a window to resolve Show and Tell or Sneak Attack through their disruption — prioritize playing around Thoughtseize by going fast on turn one before they can set up. Pyroblast and Red Elemental Blast are powerful answers to their blue threats and counters, and Mindbreak Trap punishes them for chaining multiple counterspells in response to your combo. Daze and Simian Spirit Guide are trimmed because their disruption suite makes slow setups less reliable and the extra threat density from your threats is more valuable than marginal speed.
Oops! All Spells is a pure combo deck that wins by milling its entire library with Balustrade Spy or Undercity Informer and reanimating Thassa's Oracle for an instant win, typically on turns 1-2. You are also a fast combo deck, so this is a race — your primary goal is to goldfish a threat into play before they go off. Daze is ineffective here since the opponent plays around interaction with Pact of Negation and goes off at instant speed when ready, making it nearly useless. Bring in Mindbreak Trap to counter their storm-like ritual sequences for free, Ravenous Trap to exile their graveyard mid-combo (responding to Dread Return or Narcomoeba triggers), and Faerie Macabre as a free recurring graveyard hate piece that dodges Pact of Negation. Their post-board Leyline of the Void is mostly irrelevant to your game plan since you win by cheating creatures into play, not through the graveyard.
The mirror is a race to resolve a threat first — whoever lands Emrakul or Atraxa with Sneak Attack wins on the spot, so counterspell quality matters more than quantity. Pyroblast and Red Elemental Blast are your best counters here since they hit Force of Will, Show and Tell, and Brainstorm while being uncounterable by blue interaction. Consign to Memory is a powerful answer to an opposing Show and Tell resolution that puts both players' threats into play simultaneously, and it can also counter a Sneak Attack activation targeting Emrakul. Mindbreak Trap is a free catch-all if your opponent tries to storm through your defenses with multiple spells. Daze and Flusterstorm come out because Daze loses value in a game where both players are going fast on mana and Flusterstorm is weak against non-storm threat deployment.